Auto loader not working properly

I developed a PHP app thet uses PHPExcel to create excel files. I used windows for development and the PHPExcel works great but when I moved the files into my production environment (linux / PHP 5.3.0) the autoload function doesn´t work as some classes
seem to be not found. I've included some echo traces in the autoload tyo see whats going on ad found that the require function only loads one php file, the rest are not found and not readable:

Hi EveryBody I got in touch with my hosting service and it seems it was something related to the PHP versión under which the app was running the issue was present in version 5.3.0 and we moved the version to 5.2.0 and it works perfectly.

Ensure that the autoloader doesn't clash with the autoloader for any framework that you might be using, or any other libraries that use their own autoloader. There is an entry about this in the FAQ: see
this thread for details... while the thread talks about the Joomla autoloader, the same principles may still apply. PHPExcel uses
spl_autoload_register, which should allow it to work cleanly with any other libraries/frameworks that also use spl_autoload_register; but isn't guaranteed to work with proprietary autoload functions.